RT Journal Article SR Electronic T1 17β-estradiol reduced depressive and somatic symptoms in perimenopausal women JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 21 OP 21 DO 10.1136/ebm.7.1.21 VO 7 IS 1 YR 2002 UL http://ebm.bmj.com/content/7/1/21.abstract AB